#include <string>

namespace PESI {
  // return modified string ``s'' with spaces trimmed from left
  std::string& triml(std::string& s);

  // return modified string ``s'' with spaces trimmed from right
  std::string& trimr(std::string& s);

  // return modified string ``s'' with spaces trimmed from edges
  std::string& trim(std::string& s);
}
